Making Specific Products Unpurchasable or purchasable for a specific date in WooCommerce

In this blog post, we will limit product purchasability based on various conditions.
To make a specific product not purchasable in WooCommerce, we can use a filter hook in your theme’s functions.php file or in a custom plugin. Here’s an example of how you can achieve this for a product with the ID 741:

function disable_product_purchase($purchasable, $product) {
    // Check if the product ID is 741
    if ($product->get_id() == 741) {
        // Make the product not purchasable
        $purchasable = false;
    }
    return $purchasable;
}

add_filter('woocommerce_is_purchasable', 'disable_product_purchase', 10, 2);

If we need conditions based on the product category all products under that category will not be purchasable.

function disable_products_in_category_purchase($purchasable, $product) {
    // Get the product categories IDs
    $product_categories = wp_get_post_terms($product->get_id(), 'product_cat', array('fields' => 'ids'));

    // Check if the product belongs to category with ID 57
    if (in_array(57, $product_categories)) {
        // Make the product not purchasable
        $purchasable = false;
    }
    return $purchasable;
}

add_filter('woocommerce_is_purchasable', 'disable_products_in_category_purchase', 10, 2);

We can also use a specific date when the product is purchasable or not. In this example we had some products for sale only on 11 Nov for 11-11 promotional sales.

function disable_products_in_category_purchase($purchasable, $product) {
    // Get the current date in 'm-d' format using current_time function
    $current_date = date('m-d', current_time('timestamp', 0)); // 0 for the local timezone

    // Get the product categories IDs
    $product_categories = wp_get_post_terms($product->get_id(), 'product_cat', array('fields' => 'ids'));

    if (in_array(57, $product_categories) && $current_date != '11-11') {
        // Make the product not purchasable
        $purchasable = false;
    }
    return $purchasable;
}

add_filter('woocommerce_is_purchasable', 'disable_products_in_category_purchase', 10, 2);